package com.atguigu.srb.oss.service.impl;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.model.CannedAccessControlList;
import com.atguigu.srb.oss.service.FileService;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.InputStream;
import java.util.UUID;
@Service
public class FileServiceImpl implements FileService {
    @Value("${aliyun.oss.endpoint}")
    private String endpoint;

    @Value("${aliyun.oss.keyId}")
    private String keyId;

    @Value("${aliyun.oss.keySecret}")
    private String keySecret;

    @Value("${aliyun.oss.bucketName}")
    private String bucketName;


    @Override
    public String upload(InputStream inputStream, String module, String fileName) {

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, keyId, keySecret);

        //判断oss实例是否存在：如果不存在则创建，如果存在则获取
        if(!ossClient.doesBucketExist(bucketName)){
            //创建bucket
            ossClient.createBucket(bucketName);
            //设置oss实例的访问权限：公共读
            ossClient.setBucketAcl(bucketName, CannedAccessControlList.PublicRead);
        }

        //构建日期路径：avatar/2019/02/26/文件名
        String folder = new DateTime().toString("yyyy/MM/dd");

        //文件名：uuid.扩展名
        fileName = UUID.randomUUID().toString() + fileName.substring(fileName.lastIndexOf("."));
        //文件根路径
        String key = module + "/" + folder + "/" + fileName;

        //文件上传至阿里云
        ossClient.putObject(bucketName, key, inputStream);

        // 关闭OSSClient。
        ossClient.shutdown();

        //阿里云文件绝对路径
        return "https://" + bucketName + "." + endpoint + "/" + key;

    }

    @Override
    public void removeFile(String url) {
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, keyId, keySecret);

        //文件名（服务器上的文件路径）
        String host = "https://" + bucketName + "." + endpoint + "/";
        String objectName = url.substring(host.length());

        // 删除文件。
        ossClient.deleteObject(bucketName, objectName);

        // 关闭OSSClient。
        ossClient.shutdown();
    }
}
